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INSERT … ON DUPLICATE KEY (do nothing)
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Yes, use INSERT ... ON DUPLICATE KEY UPDATE id=id (it won't trigger row update even though id is assigned to itself).
If you don't care about errors (conversion errors, foreign key errors) and autoincrement field exhaustion (it's incremented even if the row is not ins...
How do I test if a string is empty in Objective-C?
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You can check if [string length] == 0. This will check if it's a valid but empty string (@"") as well as if it's nil, since calling length on nil will also return 0.
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How can I disable a button on a jQuery UI dialog?
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If you're including the .button() plugin/widget that jQuery UI contains (if you have the full library and are on 1.8+, you have it), you can use it to disable the button and update the state visually, like this:
$(".ui-dialog-buttonpane button:contains('Confirm')")....
Good examples of Not a Functor/Functor/Applicative/Monad?
...r, but not Applicative:
I don't have a good example. There is Const, but ideally I'd like a concrete non-Monoid and I can't think of any. All types are basically numeric, enumerations, products, sums, or functions when you get down to it. You can see below pigworker and I disagreeing about wheth...
Create a Date with a set timezone without using a string representation
...urs to find out that the reason was a wrong month.
– Select0r
Feb 28 '12 at 14:17
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This answer i...
Multiple github accounts on the same computer?
...epositories using different personas, you need to make sure that your individual repositories have the user settings overridden accordingly:
Setting user name, email and GitHub token – Overriding settings for individual repos
https://help.github.com/articles/setting-your-commit-email-address-in-g...
Node.js + Express: Routes vs controller
...e in general) is it doesn't push a lot of opinions on you; one of the downsides is it doesn't push any opinions on you. Thus, you are free (and required!) to set up any such opinions (patterns) on your own.
In the case of Express, you can definitely use an MVC pattern, and a route handler can certa...
How to crop circular area from bitmap in Android
...map and I want to crop a circular region from this bitmap. All pixels outside the circle should be transparent. How can I do this?
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Should I use px or rem value units in my CSS? [closed]
...u have to press Alt, and go to View, Text Size.) It's much easier to just select the Zoom option in the browser's main menu (or use Ctrl++/-/mouse wheel).
1 - within statistical error, naturally
If we assume most users scale pages using the zoom option, I find relative units mostly irrelevant. I...
Django Reverse with arguments '()' and keyword arguments '{}' not found
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You have to specify project_id:
reverse('edit_project', kwargs={'project_id':4})
Doc here
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